Fibroadenoma of the Axillary Tail: A Common Lesion in an Uncommon Location

A 49-year-old female patient presented with a complaint of a palpable lump in her right axillary region for two months. The lump was gradually increasing in size and associated with slight discomfort. On palpation, it was a smooth, mobile, non-tender lump of approximately 2x2cm in size in the right axilla [Table/Fig-1] On sonomammography, the lump appeared well-defined and encapsulated, wider than taller, solid, with a nodular, hypoechoic, ovoid mass measuring 1.9x1.3 cm, showing minimal peripheral vascularity [Table/Fig-2]. X-ray mammogram also revealed a well-defined, oval, dense lesion without any calcification in the axilla, suggestive of fibroadenoma. Various differentials such as lymphadenopathy, lipoma, and sebaceous cyst were considered [Table/Fig-3]. Fine-needle aspiration cytology (FNAC) of the lesion was performed, confirming the diagnosis of fibroadenoma. No similar lesions were noted in the bilateral breast parenchyma or contralateral axilla. The lesion was surgically removed.